【摘要】 以石蜡为芯材，Nano-Al₂O₃改性三聚氰胺脲醛树脂为壁材，利用原位聚合法制备导热增强型石蜡相变微胶囊。采用ESEM、HotDisk、DSC、TG、FT-IR、EDS测试表征其微观形貌、导热系数、储热性能、热稳定性及化学结构。结果表明：石蜡相变微胶囊呈球状颗粒且分散均匀，相变温度30℃～31℃,热稳定性能良好。掺10%的Nano-Al₂O₃时，导热系数提高了56.8%。Nano-Al₂O₃均匀分布在壁材中，形成网状结构，使微胶囊内部与表面形成传热通道，从而赋予石蜡相变微胶囊的高导热性能和高热传输效率。更多还原

【Abstract】 With paraffin as the core material and melamine urea-formaldehyde resin modified with Nano-Al₂O₃ as the wall material, thermally conductive enhanced paraffin phase change microcapsules were prepared by in-situ polymerization.The micromorphology, thermal conductivity, thermal storage performance, thermal stability and chemical structure were characterized by ESEM,HotDisk, DSC,TG,FT-IR and EDS.The results showed that the paraffin phase change microcapsules are spherical particles and uniformly dispersed, phase change temperature is between 30 ℃～31 ℃ and the thermal stability is good.The thermal conductivity increased by 56.8 % when 10% Nano-Al₂O₃ was added.Nano-Al₂O₃ was uniformly distributed in the wall material to form a network structure, forming a heat transfer channel between the inside and surface of the microcapsule, thereby giving paraffin phase change microcapsules high thermal conductivity and high heat transfer efficiency.更多还原